Pulverizing-machine.



F. C. FERRY. PULVERIZING MACHINE.-

APPLICATION FILED um 10, 1916.

' Patented Mar. .6, 1917.

Q IIIIIIIIIII F l/VIEZVTOR, y i/i/v/r FERR, w w a ATTORNEYS powder.

PULVERIZING-MACHINE Specification of Letters Patent.

PatentedMar. 6, 1917'.

' Application fiiearai 10,1916. Serial No. 108,258.

To all whom it my concern: I

Be it known that I, FRANK G. FERRY, a

citizen of the United States, residing at East Cambridge, inthe county Of'Middlesex, in thezState of- Massachusetts, have invented a certa n new and useful Improvement in Pulverizing-Machines, of which the following, isza" specification, reference being 7 had to the accompanying drawings.

This invention relates to machines for disintegrating and pulverizlng plaster, and

the like material, and my purpose is to produce a pulverizingv machine which will. operate rapidly, cheaply and effectively to reduce blocks or sheets of old plaster to In the annexed drawings Figure 1 is a perspective view of a machine embodying my present improvements, and Fig. 2 is an underside plan view of the same. Fig. 3 is a transverse, vertical, sectional, view of said machine taken on the line 3-3 of Fig. 1. r

"Fig. 4 is a detached, plan, View of the perforated disk 24. Fig. 5 shows top and edge views of the shaft-supporting frame 22 and Fig. 6 is a plan view of the agitator blade 27 Referring to these drawings, the numeral 20 indicates a circular housing which is drawn in at the upper portion to provide a relatively smaller circumferential wall 21 within which wall is secured a frame 22 whose central portion serves, as a bearing for the upper end of a rocker shaft 23. Secured to the shaft 23 at, approximately, the level of the lower end of the wall 21, is a disk 24 which is provided with a plurality of openings 25.

Depending from the disk 24 are several.

radial blades 24.

Secured fixedly to the upper end portion of the shaft 23 is a hub 26 which has radiating therefrom a plurality of blades 27. Suspended in the housing 20 is a pan having a perforated bottom at 28 as is best seen in Fig. 2 of the drawings and, extending upward from said bottom, is a perforated circumferential wall 29 which is of considerably less diameter than the surrounding housing 20, so that an annular space 30 is provided between the walls 20 and 29. By preference, the bottom 28 and the circumferential wall 29 are corrugated as shown, in order to provide irregular abradi'ngsurfaces which aid; in breaking up and disentegrating the plaster.

I will now describe the'mechanism provided for imparting to the shaft 23 and the agitating'blades'27 and disk 24 a reciprocatingrocking movement. j v

Extending laterally from the housing 20 is a plate 31in whiclrisjourngaled a shaft 32: whose lower end portion has mounted thereon a crank-disk 33 in which is secured a wrist-pin 34 which is connected, .by means of a rod 35, with a crank-arm 36 which is secured fixedly to the lower end of the vertical shaft 23, already referred to, the arrangement of parts being such that, when the crank-disk 33 is rotated, a reciprocat-.

ing rockingmovem'ent will'be imparted to the shaft 23 and to the agitator blades 27 carried by said shaft.

The combined bottom 28 and circumferential wall 29 form a pan-shaped structure which is provided with an annular grooved flange 29 that is engaged frictionally bythe points of a plurality of screws 29; the constructionbeing such that, under ordinary conditions, the pan is held against rotation but, in the event that the machine becomes clogged by a nail, or other obstruction, while it is in operation, resulting re sistance will overcome the frictional hold of the screw points and will permit the pan to reciprocate with the agitator blades until the machine can be stopped and the obstruction removed.

The complete machine is mounted, upon legs 34, 35 and 36, at such a height above the ground or floor that a box or other receptacle may be placed under the said machine to receive the disintegrated plaster as it drops from the machine.

My described machine operates as follows The chunks or sheets of plaster are dropped in the upper housing 21 where they are immediately beaten and knocked about by the rapid reciprocating action of the, arms 27 until the chunks or sheets are broken up and caused to drop, through the openings 25, upon the perforated fixed bottom 28 where they are again acted upon and beaten into finer particles by the plurality of beater blades 24 already described. As fast as the plaster is beaten up fine enough it sifts down through the perforated bottom 28 or outward through the perforated circumferential wall 29', as the case may be, and finally drops to the floor beneath the machine or into a'receptacle placed below the machine.

M described machine may be madeat a reasonable cost; it operates rapidly and by its use I am able to pulverize and reclaim masses of plaster which are ordinarily thrown away.

Having thus described my invention I claim as new and wish to secure by Letters Patent 1. In combination, in a pulverizing machine, a housing with perforated bottom and perforated circumferential wall, agitating mechanism within said housing, comprising a reciprocating disk with openings therein and depending radial blades, and means for rocking said agitating mechanism with a reciprocating movement.

2. In combination, in a pulverizing machine, a housing comprising two sections of relatively different diameters, a perfo ated bottom fixed in the larger of said sections, said bottom being formed with an upwardly extending perforated rim, agitating mechanism, in said housing, comprising a reciprocating perforated disk, radial blades, carried by said disk, and a plurality of agitator blades 27.

FRANK C. FERRY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

